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Title: Deuterium retention in W and W-Re alloy irradiated with high energy Fe and W ions: Effects of irradiation temperature
Authors: Hatano, Y.
Ami, K.
Alimov, V.Kh.
Kondo, S.
Hinoki, T.
Toyama, T.
Fukuda, M.
Hasegawa, A.
Sugiyama, K.
Oya, Y.
Oyaidzu, M.
Hayashi, T.
Author's alias: 近藤, 創介
檜木, 達也
Keywords: Tungsten
Tungsten-rhenium alloy
Irradiation
Defect
Trap
Hydrogen
Hydrogen isotope
Issue Date: Dec-2016
Publisher: Elsevier BV
Journal title: Nuclear Materials and Energy
Volume: 9
Start page: 93
End page: 97
Abstract: Neutron irradiation to W induces defects acting as traps against hydrogen isotopes and transmutation elements such as Re and Os. To investigate synergetic effects on radiation-induced defects and Re, deuterium (D) retention in W and W–5% Re samples were examined after irradiation with 6.4 MeV Fe ions at 523–1273 K followed by exposure to D2 gas at 673 K. The value of D retention in W–5% Re was lower than that in W by orders of magnitude after the irradiation at high temperatures (≥1073 K), while no significant effects of Re addition was observed after irradiation at 523 K. Irradiation with 20 MeV W ions at room temperature followed by exposure to D plasma at 443–743 K also resulted in small difference in D retention between W and W–5% Re samples. The results of positron lifetime measurements showed that the reduced D retention by Re observed after high temperature irradiation was due to suppression of formation of vacancy-type defects (monovacancies and vacancy clusters) by Re.
Rights: © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
URI: http://hdl.handle.net/2433/218608
DOI(Published Version): 10.1016/j.nme.2016.06.016
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